Manual pump pre-orientable on the neck of a container

Abstract

Oriented pump having a push-member-distributor (3) axially and angularly movable including at least one lug (35) cooperative with a blocking ramp having an indexed abutment for preventing and allowing at will the depression of the push-member and the disengagement of the push-member from bearing on the head of the piston (2). The seal is maintained between the push-member and the rod of the piston in all positions and the push-member is axially retained independently of the piston. The push-member is oriented on the neck of a given container at will when assembling the pump.

What is claimed is: 
     
       1. A manual pump adapted to be connected to the neck of a container, said pump comprising an axial pump body, a cap cooperating with said neck for fixing said pump body thereon, a piston slidable in said pump body in a reciprocating manner and having a free end part, an axially and angularly movable push-member loosely mounted onto the free end part of said piston for reciprocating said piston in said pump body, said push-member having at least an upper, non-depressed position and a lower depressed position, and at least a first angular position and a second angular position, said push-member having a distribution nozzle and at least one radial lug having a free end, a ring coaxially mounted with respect to said cap and said pump body and surrounding said piston at least partially, said ring having an inner wall with at least one longitudinal groove therein cooperating with said lug, whereby when said push-member is in said first angular position the lug is aligned with said groove permitting depression of said push-member and said piston to said lower depressed position, and at least one ramp therein having a lower part opening into said groove and an upper part angularly offset with respect to said groove, whereby rotation of said push-member to said second angular position while in said upper, non-depressed position aligns said lug with said upper part of said ramp preventing depression of said push-member and said piston, said upper part terminating in a radial abutment engageable by said lug to limit angular rotation of said push-member, said push-member being disconnected from said piston when said push-member is in said upper and second angular position and freely bearing against a head of said piston for the depression thereof, and slidable sealing means-disposed between said free end part of said piston and said push-member. 
     
     
       2. The pump of claim 1, wherein said push-member has a blind cavity and an open cylindrical portion communicating with said blind cavity and coaxial therewith, said free end part of said piston being located in said cavity, said cavity having an upper end which communicates with said distribution nozzle of said push-member and a bearing abutment for receiving a peripheral portion of said free end part of said piston, said cavity having a lower end opening into said open cylindrical part, an annular lip extending outwardly into said open cylindrical part, an annular lip extending outwardly from said free end part of said piston being slidably mounted in a sealed manner in said open cylindrical part, said push-member and said ring having mutually complementary engaging portions for axially retaining said push-member with respect to said piston without hindering said push-member's freedom of rotation and depression of said piston while allowing it to be disconnected form said free end part of said piston when said push-member is in said second angular position and said lug bears against said upper part of said ramp. 
     
     
       3. The pump of claim 1, wherein said push-member has at least one additional radial lug angularly offset from said at least one radial lug and said ring has at least one additional groove and at least one additional ramp in said inner wall thereof for cooperation with said at least one additional radial lug. 
     
     
       4. The pump of claim 3, wherein said additional lug is diametrically opposed to said at least one lug and said additional groove and ramp are diametrically symmetrical with said at least one groove and ramp. 
     
     
       5. The pump of claim 1, wherein said ring includes means for angularly immobilizing said ring in said cap. 
     
     
       6. The pump of claim 5, wherein said cap has an annular cavity and an axial opening therein, said ring extending through said axial opening and having a flange adapted to fit into in said annular cavity and at least one deformable radial lug for locking said ring with respect to said cap. 
     
     
       7. The pump of claim 6, wherein said annular cavity of said cap also receives a flange on said pump body, said pump body flange having means for sealingly bearing against the neck of the container when said cap is applied thereto and means for axially fixing said flange in said cavity of the cap. 
     
     
       8. The pump of claim 1, wherein said cap has angular indexing means for orienting the cap between said first and second angular portions, and complementary means on said ring cooperating therewith. 
     
     
       9. The pump of claim 1, wherein said ring has an internal annular shoulder for freely guiding said piston, at least three longitudinal ribs projecting from a lateral wall of said piston cooperating with said shoulder. 
     
     
       10. The pump of claim 1, comprising an outer sleeve completely surrounding said cap and extending beyond a free edge of said push-member. 
     
     
       11. The pump of claim 10, wherein said sleeve includes at least one internal blocking rib bearing against an edge of said cap.